Area Forecast Discussion
Issued by NWS Seattle/Tacoma, WA

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103
FXUS66 KSEW 142205
AFDSEW

Area Forecast Discussion
National Weather Service Seattle WA
305 PM PDT Fri May 14 2021

.SYNOPSIS...Dry conditions and warm temperatures will continue
through the weekend as an upper level ridge builds across the
Pacific Northwest. The ridge will then weaken on Monday as an
upper level low starts to drop down into the region from the
northeastern Pacific. This will result in a return to cooler and
wetter conditions starting Tuesday and persisting through much of
the next week.

&&

.SHORT TERM /TONIGHT THROUGH MONDAY/...It`s shaping up to be a
pretty nice afternoon across western Washington, with recent
satellite imagery showing that the morning stratus has mainly
retreated back to the Pacific Coast. Overall, expect stratus to
continue to break up along the coast through the remainder of the
afternoon hours. A few cumulus have popped up across the higher
terrain of the Olympics and Cascades this afternoon, but
otherwise, satellite shows mostly clear skies across the interior.
Temperatures are currently trending in the 50s along the Pacific
Coast and mid 60s to low 70s across the interior as of 2 PM.
Expect afternoon highs to top out in the low 60s for coastal areas
and upper 60s to mid 70s across the interior this afternoon.

Dry conditions and above normal temperatures will continue
through the weekend as an upper level ridge builds across the
Pacific Northwest. Onshore flow will continue through the
weekend-so can expect stratus to develop along the Pacific Coast
each night and morning. However, current gradients are not strong
enough to push the stratus all the way inland past Puget Sound.
Afternoon high temperatures will push into the mid to upper 70s
across the interior, while remaining in the 60s along the coast.

A stronger marine push is on tap for Sunday night into Monday
morning, with gradients currently suggesting stratus making its
way back into Puget Sound for morning clouds. The upper level
ridge will then weaken on Monday, allowing for temperatures to
cool across the interior- and only top out into the 60s and low
70s. 14

.LONG TERM /TUESDAY THROUGH FRIDAY/...Chances of precipitation
return Tuesday as a cool upper level low drops down into the
region from the northeastern Pacific. Wet and unsettled conditions
will continue through Friday as the upper level low then gradually
makes its way inland. High temperatures look to cool closer to
average for the time of year-topping out into the mid to upper 50s
for the coast and low 60s for the interior. 14

&&

.AVIATION...Light northerly flow aloft becoming northwesterly
overnight with light low level onshore flow.

Stratus will redevelop along the coast overnight with ceilings below
1000 feet and visibility 3-5sm in fog after 03z. Light onshore
likely keep the stratus west and north of Puget Sound Saturday
morning.

KSEA...Clear skies. Northerly winds 6 to 10 knots veering to
northeast 4 to 8 knots overnight.

&&

.MARINE...Offshore high pressure offshore will remain in place
through the weekend with northwest winds persisting over the coastal
waters and onshore flow through the Strait of Juan de Fuca. Morning
fog and low clouds will develop over the coastal waters, through the
Strait of Juan de Fuca and some isolated parts of Puget Sound.

Typical small craft westerlies will develop in the Central and
Eastern Strait of Juan de Fuca tonight as well as the ongoing
northwesterlies over the outer coast waters.
This will also lead to steeper seas to develop given this
persistent fetch across the waters. Expect seas 5 to 7 feet through
the weekend. Have extended the small craft advisory for the outer
coastal waters into Saturday morning and have issued a small craft
advisory for central and south inner coastal waters tonight. A
stronger surge of west winds through the Strait of Juan de Fuca
remains possible - with the potential for gale force winds - is
possible Sunday evening. Seas likely ease back into the 4 to 6 ft
range over the coastal waters for the start of next week.

&&

.SEW WATCHES/WARNINGS/ADVISORIES...
WA...None.
PZ...Small Craft Advisory until 5 AM PDT Saturday for Coastal Waters
     From Point Grenville To Cape Shoalwater Out 10 Nm.

     Small Craft Advisory until noon PDT Saturday for Coastal Waters
     From Cape Flattery To James Island 10 To 60 Nm-Coastal
     Waters From James Island To Point Grenville 10 To 60 Nm-
     Coastal Waters From Point Grenville To Cape Shoalwater 10
     To 60 Nm.

     Small Craft Advisory until 1 AM PDT Saturday for Coastal Waters
     From James Island To Point Grenville Out 10 Nm.

     Small Craft Advisory from 6 PM this evening to 5 AM PDT Saturday
     for Central U.S. Waters Strait Of Juan De Fuca-East
     Entrance U.S. Waters Strait Of Juan De Fuca.

&&

$$

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